MBI5031中文资料
Macroblock, Inc. 2006
Floor 6-4, No.18, Pu-Ting Rd., Hsinchu, Taiwan 30077, ROC.
Features
z Backward compatible with MBI5026 in package
z 16 constant-current output channels z 12-bit grayscale PWM control
z Scrambled-PWM technology to improve refresh rate z Open-Circuit Detection to detect individual LED errors z 8-bit programmable output current gain z
Constant output current range: 5 ~ 45mA at 3.3V supply voltage
5 ~ 60mA at 5.0V supply voltage
z Output current accuracy:
between channels: <±3% (max.), and between ICs: <±6% (max.)
z Staggered output delay
z Maximum data clock frequency: 25MHz z Schmitt trigger input z 3.0V-5.5V supply voltage
Product Description
MBI5031 is designed for LED video applications using internal Pulse Width Modulation (PWM) control with 12-bit gray scales. MBI5031 features a 16-bit shift register which converts serial input data into each 12-bit pixel gray scale of output port. At MBI5031 output port, sixteen regulated current ports are designed to provide uniform and constant current sinks for driving LEDs with a wide range of Vf variations. The output current can be preset through an external resistor. Moreover, the preset current of MBI5031 can be further programmed up or down to 128 gain steps for LED global brightness adjustment.
With Scrambled-PWM (S-PWM TM ) technology, MBI5031 enhances Pulse Width Modulation by scrambling the “on” time into several “on” periods. The enhancement equivalently increases the visual refresh rate. When building a 12-bit gray scale video, S-PWM? reduces the flickers and improves the fidelity. MBI5031 offloads the signal timing generation of the host controller which just needs to feed data into drivers. MBI5031 drives the corresponding LEDs to the brightness specified by image data. With MBI5031, all output channels can be built with 12-bit color depths (4,096 gray scales).
GF: SOP24-300-1.00
Gain = 1/8
…
Gain =1
…
128 steps
…
128 steps
Gain =1.9882 …
…
(0,0,0,0,0,0,0,0)
(0,0,0,0,0,0,0,1
(0,0,0,0,0,0,1,0)
(1,0,1,0,1,0,1,1)
(1,1,1,1,1,1,1,1)